Improvement in mill-bushes



H. F. PRISBI. Mllstone Bush..

Jaya.

@haar .ss/tata @tutti @dat Letters Patent No. 110,843, ma January 10,1871.

IMPROVEMENT IN MILL-BUSHES.

The Schedule referred to tu these Letters I-Eatent and making part of the same.

To all whoinz't may concern:

Be it known that I, HAMLIN F. FRISBIE, ot' Danville, in the county of Vermillion and State ot' Illinois, have invented a new and improved Mill-Bush; and I do hereby declare that the following is a full, clear, and exact description thereof, which will enable others skilled in the art to make and use the same, reference being had to the accompanying drawing forming part 'of this specification.

My invention relates to bushes for mill-stones; andA It consists in the improvements herein described and after-wardspecilied in claims.

Figure 1 represents a sectional elevation of my im,- proved bush; and

Figure 2 is a top view with the cover removed. Similar letters of reference indicate corresponding parts.

A is the cast-metal shell of the bush, made with the four usual recesses B, for the bearings O above the bottom .plate D.'

Between these recessesare the triangular parts E of the bush, extending to the wall of the central bore', for the spindle-bearing F.

I propose to make vertical openings, G, in these parts, extendingfrom bottom to top, or as high as the said parts E rise, for the admission and circulation of air to keep the bearings and journal cool.

I propose to make m'etal bearings, 0,*and provide. them withoil-recesses, H, from which-holes I 'lead through the wall to the journal for holding oil or other lubricating substance and supplying it to the wearing parts, thesaid holes being packed with wicking or other absorbent material, which'will regulate the Elow.

For keying up the bearings to the journal I make vertical recesses behind them andv place therein wedges, I, provided with yadjusting-screws K, litted through the bottom and arranged to force thew-edges up and down, and for the application of the hand to the knobs L below for turning them.

In this example Iihave represented a large annular recessin the bush-case at the top, under the detachable cap M,in which I propose to place, when preferred or required, the annular oil-vessel'N, with holes O leading to the spindle F, to be filled with absorbent material for lubricating -the spindle above the tops of the bearings; but, in case this Avessel is not used, the parts E. of the bush and the bearings will be extended to the top of the part A, or thereabout.

The bearing faces of the bearing-blocks C may have Babbit or other soft or composition metal ttedinto the. grooves P- therein, or otherwise attached, to reduce the-heat and friction.

The recesses for the bearings C are placed opposite the corners of the bush, and thereby more space is adorded forv the recesses for the keys I.. This arrangement causes the parts E to come opposite the centers of the sides of the bush where the metal is thinnest and strengthen them.

It will be seen that a considerable circulation of air may be kept u p in contact with the bearings and other parts ot" the bush well calculated to prevent heating, l

and that the bearings may be adjusted while the stone is running in a very accurate and reliable manner, without att'ecting the train of the spindle.

, Having thus described? my invention, l

' I claim as new and desire to secure by Letters Patent- 1. The combination,- with a wedge, I, ot' recessed knob and washer L, a shouldered and studded bolt, and a clamping-nut, all constructed and applied as shown in fig. l of drawing.

`2. The hollow bearing-:pieces H C, combined with a case, B, hollow' triangular pieces EG, and upper annular chamber M 0, constructed and relatively arranged as shown and described.

HAMLIN F. FRISBIE.

' Witnesses: y

ALEXANDER Loc un, WM. M. LASH. 

